viirya commented on code in PR #36851:
URL: https://github.com/apache/spark/pull/36851#discussion_r906408695
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sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/SchemaPruning.scala:
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@@ -103,8 +104,14 @@ object SchemaPruning extends Rule[LogicalPlan] {
}
}
+ private def containsNestedColumn(fsRelation: HadoopFsRelation): Boolean =
Review Comment:
Oh, I see. Operators will collect metadata column names. And during query
execution, it will update into a row based on these column names. In
`prunePhysicalColumns`, no matter the config value is, it always prune metadata
columns.
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